Description: Main Features:Perfect compatibility with IOS system 11 and above, built-in decoding chip, audio output and charging synchronization, perfect support for earphone function; Support call + charging + listening, charging current 1.5a (support iOS11 system); Charging current: 1.5a; Frequency response: 20hz-20khz; Listen to music + charge 1.5A+ direct call, support apple original headset all line control function. Earphone recognition time is 3 seconds. Listening to music and charging, no order. The product is inserted into the headphone and the phone, without order.